.TH "pfssize" 1
.SH NAME
pfssize \- Resize frames
.SH SYNOPSIS
.B pfssize
[--x <new_width>] [--y <new_height>] [--ratio <scale_ratio>] [--maxx <max_width>] [--maxy <max_heigh>] [--minx <max_width>] [--miny <max_heigh>] [--filter <filter-name>]
.SH DESCRIPTION
Resize all frames and all channels in the stream. Note that resampling
is done on each channel as it is - for color images resampling is
usually done in linear (not gamma corrected) XYZ color space.
.SH OPTIONS
.TP
--x <new_width>, -x <new_width>

New x resolution in pixels.

.TP
--y <new_height>, -y <new_height>

New y resolution in pixels.

.TP
--ratio <scale_ratio>, -r <scale_ratio>

Resize both width and height using the given ratio. Ratio equal 1 is the original
size, lower than 1 makes the frames smaller and greater than 1,
enlarges the frames.

.TP
--minx <max_width>, --miny <max_heigh>

Make sure that the resulting image has at least <min_width> width
and/or <min_height> height. Cannot be used in combination with -x, -y
and --ratio.

.TP
--maxx <max_width>, --maxy <max_heigh>

Make sure that the resulting image has at most <max_width> width
and/or <max_height> height. Cannot be used in combination with -x, -y
and --ratio.

.TP
--filter <filter-name>, -f <filter-name>

Use filter <filter-name> for upsampling (on downsampling, box filter
is always used). Available filters:

.B BOX
Box filter. This is the fastest filter, but it also causes
visible aliasing artifacts.

.B LINEAR
(default) Bi-linear filter.

.B MITCHELL
Mitchell filter. From \fIMitchell and Netravali, Reconstruction
Filters in Computer Graphics,In Computer Graphics, vol. 22 (4)
1988\fR. Since the filter contains negative parts, it may cause halo
artifacts and it may result in negative values for HDR images.


.SH EXAMPLES
.TP
pfsin memorial.hdr | pfssize -r 0.25 | pfsout memorial_small.hdr

Lower the resolution of memorial.hdr four times.

.SH "SEE ALSO"
.BR pfsin (1)
.BR pfsout (1)
.SH BUGS
Please report bugs and comments to Rafal Mantiuk
<mantiuk@mpi-sb.mpg.de>.
